Apparatus for treating solutions



H. FRlscHER May 7, 1929.

APPARATUS FOR TREATING SOLTIONS Filed Nov. 30 1927 Patented May 7, 1929.1,711,638

vUNITED STATES PATENI OFFICE.

HERMANN FRISCHER, OF COLOGNE-LINDENTHAL, GERMANY.

APPARATUS FOR TREATING SOLUTIONS. y

Application filed November 30, 1927, Serial No. 236,706', and in GermanyDecember 6, 1926.

My invention refers to apparatus for treatformed into helically bentblades 9 adapted, ing solutions. It is. an object of my .invenwhenrotating in one direction,- to impart to tion to provide a combineddissolving filtering the liquid, in which they aretraveling a moveandwashing apparatus. ment in upwards -and inwards' direction.

The apparatus hitherto in use do notperf Means are provided at 10for-heating the liq- 55 mit satisfactorily dissolving, filtering and uidin the drums. Washing in a. single vessel soluble bodies such Fig. 2illus rates a horizontally arranged as salts and the like intermingledwith intank 11 with a sieve drum 12. The substance soluble substances.to be dissolved is fed in at 13, the solvent at Cil 10 I have found thatthese three o erations 14. I am thus enabled to treat the material 60can easily be carried out in a sing e Vessel, in a continuous manner,the'substance to be which may be a horizontally or verticallyartreatedbeing Washed and dissolved on its way ranged cylindricalvessel, in which is mountfrom the entrance end to the exhaust end, theed a stirring device with a sieve drum or concentrated liquorbeingwithd'rawn at 15.

15 drums forming filters and having arranged Here also dissolution canbe expedited by 65 on their circumference stirring blades of a heatingWith steam either directly or indirectsuitable shape. If the materialt'o be disly, andapluralityof sieve ,drums may be prosolved isintroduced into the drum which convided.` The sieves may be cylindricalor conitains the solvent, rotation of the -drum Will cal, taperingeither towards the entrance or cause dissolution of the material and thesolul the exhaust. end.

tion thus formed willgradua-llypass acrossthe The material to be chosenfor the tanks y" walls of the drum, leaving behind the insoluand thesieve drums will have'to be chosen acble constituents and being returnedinto the. cording to the substances to be treated. Imay drum by thestirring blades which force the use sieves of perforated metal or Wiremesh,

solution across the upper parts of the drum suitable filtering materialbeing placed Walls. In this manner they solution can be around thedrums, or sieve drums consisting made to circulate repeatedly betweenthe sieve of porous ceramic materials or the like may drum and the outervessel and, after it has be used. v been tapped 0E, the residue in thedrum can I Wish it to' be understood that I do not :to be washed withWater or the like or With desire to be limited'to the exact details of80 fresh solvent. If desired, a plurality of conconstruction` shown anddescribed' for obcentric sieve drums may bie provided, which Viousmodifications will occur to afperson permit filtering in stages. skilledinthe art.

In the drawings affixed to this specification I claim and forming partthereof an apparatus em-l l. A combined dissolving, filtering'` and 85bodying my invention is illustrated diagramwashing apparatus comprisinga vessel, a roy inatically by wayof example. tary stirrer in saidvessel, a sieve or filter Fig. 1 is a vertical axial section, drumcombined with said stirrer to form a ro- Fig. 2 is a similar view' of amodification. 'tary unit and stirring blades on the outer wall 40Referring first to Fig. 1, 1 is the vessel or of said drum? v 90 tankproper and 2 is a vertical shaft extend- 2. A combined dissolving,filtering and ing axially of the tank and across its bottom, washingapparatus comprising a vessel, a ro- 3 beinga -pulley mounted onthe freeend of y tary stirrer in said vessel, a sieve or filter the shaft, theupper end of which is supported ajlrum combined with said stirrer toform a in a bearing 4: forming part of the cross beam ""ioqtary unit andstirring blades on the outer 95 5. 6, 6 are. stirrer arms mounted on theshaft Wall ofsaid drum, said blades being arranged and 7, 8 areconcentric sieve drums secured to force liquid in upwards and inwardsdirecon the shaft-and traversed by the arms 6. -The tion.

outer ends of these arms project from the per- In testimony whereof Iaffix my signature.

forated wall of the outer drum 8 and are HERMANN FRISCHER.

